Dispensing-pump mechanism



F. Br EILERS ET AL DISPENSING PUMP MECHANISM June 17, 1924.

Fiied July 10,1

922 2 Shgets-Sheet 1 //IIr I IIII I7I/IIII IIIIVI/ llllllflrlf June 17,1924.

F. B/EILERS ET AL DISPENSING PUMP MECHANISM Filed July '10 1922 2Sheets-Sheet 2 m wmr Patented June 17, 1924.

Nrrao s'r FRANK B. EILERS AND NESTOR FRIES, OF FORT WAYNE, INDIANA,ASSIGNOBS TOKHEIM OIL TANK AND BUMP COMPANY, A CORPORATION OF INDIANA.

DISPENSING-PUMP MECHANISM.

Application filed July 10, 1922. Serial No. 573,889.

To all whom it may concern Be it known that we, FRANK B. EILERS andNnsToR FRIES, citizens of the United States of America, and residents ofFort iVayne, in the county of Allen and State of Indiana, have inventedcertain new and useful Improvements in Dispensing-Pump Mechanism, ofwhich the following is a specification.

This invention relates to improvements in dispensing pump mechanism, andthe objects thereof are: first, to provide a simple mechanism foractuating a reciprocal pump member selectively in opposite directions atdifferent speeds under control of an operat-. ing crank; and second, toprovide an externally operable enclosed stop mechanism for limiting thedischarge stroke of the pump member selectively at diflerent stages andto provide also an indicating means therefor.

These objects are accomplished by the construction illustrated in theaccompanying drawings in which Fig. 1 is a fragmentary elevation of apump stand in section and including actuating mechanism for thereciprocatingpump member and for adjusting the stop mechanism.

Fig. 2 is an elevation projectedfrom Fig. 1, a portion being broken awayto disclose the stop mechanism;

Fig. 3 is a detail view showing a cross section of the pump member andthe stops therefor on the line -3 of Fig. 2; i

Fig. 1 is a front :elevation of the upper portion of the pump stand uponan enlarged scale, with portions broken away;

Fig. 5 is an enlarged detail view showing a cross-section of the stopson the line 5 of Fig. 2; and

Fig. 6 is a fragmentary elevation projected from Fig.5.

The characters appearing in the description refer to parts shown in thedrawings and designated thereon by corresponding characters:

The invention comprises a hollow pump stand 1 having therein areciprocal pump member 2 consisting of a rack of the type ordinarilyused for actuating a pump. In

the upper part ofthe stand is contained a back earingconsisting of ashaft 3 having a pinlon 4 and toothed wheel 5 fixed thereon,

the pinion having operable relation with the rack.- Also,- in the standis arranged a and longitudinal movement in the bearings 7 and 8. Uponthe crank-shaft are loosely mounted two clutch-actuated gears, 9" and10, that have constant meshing engagement respectively with the rack 2and the toothed wheel 5. The clutch gears are spaced apart andpositioned with their toothed ends "oppositely disposed. The gear '9 hasa groove 11 in its hub into which extends a fixed plate 12 whichprevents longitudinal movement of the gear, and the gear 10 has a flange13 that projects over the side of the wheel 5 and serves to prevent thegear 10 from having longitudinal movement.

Upon the crank-shaft, between the clutch gears, is fixed a clutch'member14: that is adapted to selectively engage the clutch gears 9 andlOaccordingly as the crankshaft 6 is longitudinally positioned so thatsaid gears maybe severally actuated when the crank-shaft is rotated. Theends of the clutch member 14 and the ends of the respective clutch gearsadjacent thereto are sawtoothed, the slant of the teeth on said memberand gears being such that when either gear is engaged by said membermovement i may be imparted thereto by rotating the crank-shaft in onedirection, and so that said member will becomedisengaged and inoperativewhen the crank-shaft is oppositely rotated. For instance: When thecrankshaft is pushed in and turned clockwise, the

member 14; when the crank-shaft is pulled outwardly and turned clockwisethe gear 10 will become engaged and driven by said clutch member; andwhen the crank-shaft is rotated backwardly the clutch member willidlyrotate with the crank-shaft, out of engagement with the gears.

Within the stand is a shaft 15 rotatably 'mounted in a position parallelwith and adcrank-shaft 6 adapted to have both rotary gear 9 will beengaged and driven by the Jim from'in parallel relation with the shaft1-5. The stops var in length and each is provided with a Xed nut 23 bywhich it may be adj'ustably turned in the flange.

Guides 24c are provided on the shaft for holding the stops in properorder. notched collar 25 is mounted on the shaft 15 and is verticallymovable thereon and adapted to engage the nut 23 of each stop andthereby prevent the stops from being turned in the flange 17. The collarhas a set screw 26 for securing it in place on the shaft and the standhas a sealed door 27 adjacent the collar, which, when opened admits ofmalt; ,i ng readjustments of the stops. By turning the shaft 15 upon itsaxis the stops may be severally positioned into the path of a lug 28that projects from the rack '2 near its lower end, so that the upwardstroke of the rack is thereby limited more or less accordingly,

In the lower .part ofthe stand is a casing 29 having a glazed sightopening 30 and containing a rotatable flange 31 which is mounted upon ashaft 32 that extends centrally through the casing. The shaft has uponits front end exterior of the casing, an operating lever 33, and uponits inner end a miterzgear 3ithat meshes with a similar miter gear 35which is fixed'up on avertical spindle 36 in the stand. The lower end ofthe shaft 15 is operatively connected with the spindle 36 by means of asleeve 37 so that as the spindle is turned the shaft will be likewiseturned and the stops thereby moved accordingly into the path of the lug28 on the rack. In the casing is a spring-pressed detent pin 38 thatbears against the rear face of the flange 31, the flange being notchedto receive the detent member 38 so as to be fricti on'ally held inadjusted positions to which it is turned by manipulating the operatinglever Upon thedisk are displayed characters '39 that are broughtsuccessively into position at the sight opening in the casing, whichcharacters are significant of the respective stops, the particularcharacter appearing at the sight opening being significant of the particular stop that is positioned for engagement by the lug on the rack.Each character is also significant of the quantity of liquid that isdispensed upon-anoperation of the pump member under the limitation ofthe corresponding stop.

In utilizing the invention the rack is connected up with the plunger ofa disip-lacement pump (notshown) of the recipro cal type adapted todeliver liquid in varying quantities according to the extent ofanovement'of its plunger'as in the usual practice and the various stopsare turned in the flange to 'efiect respective adjustments thereof sothat the rack will be accordingly limited at corresponding stages of itsstroke,

and thus insure accuracy of the various quantities of liquid to bedischarged by the pump. The notched collar is then slid upwardly uponthe shaft 15 so as to engage all of the nuts on the stops, and issecured in engaging position by tightening the setscrew and closing thedoor. In operating the invention, the lever 33 is turned until thecharacter on the dial that is significant of the quantity of liquiddesired appears the sight opening. For instance: in an apparatus havinga five gallon capacity, the full stroke of the pump member being'required, the lever is turned so that the stop 18 is positioned in thepath of the lug on the rack, which admits the full stroke of the pump;or, if a lesser quantity is required, the lever is turned to suchposition as to bring the desired stop into the path of the lug accordingto the quantity of liquid desired. The crank-shaft is then drawnoutwardly and rotated, clockwise, causing the clutch member to engageand drive the clutch-gear 10, thus imparting upward movement to the rackthrough the medium of the back gearing until the movement of the rack isinterrupted by the stop mechanism. The crank-shaft is then pushedinwardly and turned, clockwise, so that the clutch member is moved fromengagement with the clutch gear 10 and into actuating engagement withthe clutch gear 9 and cansing downward movement on the return stroke ofthe rack. As the action of the clutch gear 9 is with the same velocityas the crank-shaft, the downward movement of the rack is comparativelyfaster than its upward movement which is effected through the medium ofthe back gearing with the incidental additional leverage that isnecessary in effecting the upward or discharge stroke of the pump whichusually requires greater force than the returning stroke. in this mannerthe physical force applied to the crank-shaft during the upward anddownward strokes of the pump member is more nearly uniform while thereturn stroke thereof is accelerated.

What we claim is a 1. In dispensing vpump mechanism including a closedstand and rack-bar movable therein and gearing for actuating therackbar, a rotatable shaft arranged in the stand (parallel with therack-bar; a flange member fixed on the shaft; a series of stop rodsarranged in a concentricseries around said shaft, each rod havingthreaded. relation in the flange member thereon, said rods differing inlength and being adapted to have engagement With the rack-barselectively accordingly as said shaft is adjustably turned;

guides on said shaft for said rods; means adapted to have sealedadjustment on said shaft and locking engagement with said stopscollectively; and means operable from rotatable shaft arranged in thestand parallel with the rack-bar; a flange member fixed on the shaft; aseries of stop rods arranged in a concentric series around said shaft,each rod having threaded relation in the flange member thereon, saidrods difiering in length and being adapted to have engagement with therack-bar selectively accordingly as said shaft is adjustably turned;guides on said shaft for said rods; and means adapted to have sealedadjustment on said shaft and locking engagement With said stopscollectively.

In dispensing pump mechanism including a stand and rack-bar movabletherein and gearing for actuating the rack-bar, a rotatable shaftarranged in the stand parallel With the rack-bar; a flange member fixedon the shaft; and a series of stop rods arranged in a concentric seriesaround said shaft, each rod having threaded relation in the flangemember thereon, said rods differing in length and being adapted to haveengagement with the rack-bar selectively accordingly as said shaft isadjustably turned.

4. In dispensing pump mechanism includ ing a closed stand and rack-barmovable therein and actuating mechanism for thev rack-bar; a stopmechanism within the stand comprising a shaft arranged parallel With therack-bar; a flange member fixed on the shaft; a series of stop rodsarranged in a concentric series around said shaft, each rod having afixed nut thereon and'threaded relation in said flange member, said rodsdiffering in length and being adapted to have engagement With the rackbar selectively accordingly as said shaft is adj ustahly turned; sealingmeans for securing said nuts collectively; and means operable from theexterior of the stand for turning said shaft.

In testimony whereof We aflix our signatures in presence of twoWitnesses.

FRANK B. EILERS. NESTOR FRIES.

Witnesses:

MATILDA Mn'rrnnn, W. G. Bonus.

